A data model is a representation of the information consumed and
produced by a system, which lets you analyze the data objects present in the system and the
relationships between them. PowerDesigner provides conceptual, logical, and physical data
models to allow you to analyze and model your system at all levels of
abstraction.
A physical data
diagram provides a graphical view of your database
structure, and helps you analyze its tables (including their
columns, indexes, and triggers), views, and procedures, and the
references between them.
A
multidimensional data diagram provides a graphical
view of your datamart or data warehouse database, and helps you
identify the facts and dimensions that will be used to build its
cubes.
The data model is a very flexible tool, which allows you quickly to develop your model without constraints. You can check the validity of your Data Model at any time.
You can easily import a model built with ERwin into PowerDesigner with no loss of metadata. PowerDesigner allows complete flexibility through reliable linking and synchronization between conceptual, physical and object-oriented model approaches, providing outstanding model clarity and flexibility.